A woman walks out on her husband and their three kids – two teens, one five-year-old - after 19 years of marriage. She doesn’t want custody. What could be so wrong with the man that she’s driven to such drastic action? Eleven months later, Greg (Christopher Eccleston, anguished but plucky, with a shaky Northern Irish accent) doesn’t seem to have the answer.

Should Mum end here? There have been only two series on BBC Two, and it closed the second with all the characters poised for the next step. A third series has been commissioned, so there will be the opportunity to see what happens next for Cathy and Michael now they’ve hugged and, for the second time, held hands. In Spain they might even get round to kissing. But the bitter-sweet comedy of romantic yearning is one thing and fulfilment not the same at all.

Ever nursed an immoderate fondness for Ingrid Bergman? In Her Own Words, a bio-documentary released in the cinema then on DVD in 2016 and shown last night on BBC One as part of the Imagine... strand, was an entrancing, melancholy memoir in letters, diaries and above all personal footage.

The mystery remains of why they keep tucking away The Good Fight on More4, as they did with its illustrious predecessor The Good Wife. No disrespect to 4’s ancillary channel – now seemingly the designated last resting place of Grand Designs – but it’s like hanging a sign on the door saying “niche viewing, please knock quietly before entering”.

There is a jaguar in the house. Aged five days, and having been rejected by her mother, Maya has arrived from the wildlife park where she was born for hand-rearing by Giles Clark at his home in Kent. The cub is going to spend her early days with his family, with round-the-clock care from Giles, obsessed as he is with the situation of big cats worldwide.

When ITV scheduled this new series of The Durrells for mid-March, they probably didn’t imagine it would coincide with the return of the Beast from the East, with its blizzards and plummeting temperatures. Under these deep-frozen circumstances, what could be more reassuring than to batten down the hatches and take a trip to the glittering Mediterranean and the mountains, blue skies and historic architecture of Corfu?

To Belgium for the latest continental instalment of murder really rather unpleasant. 13 Commandments, yet another crime drama brought to Channel 4 under the auspices of Walter Presents, began with the grizzliest manner imaginable.

Mild controversy hovers over the new film by Alex Garland, the novelist-turned-screenwriter-turned-director. Garland’s 2015 directing debut, Ex Machina, was a slow-burning hit which found favour with critics and film festival juries.

They don’t commission many television documentaries like Being Blacker (BBC Two) any more. That is not unconnected to the fact that Molly Dineen downed her camera a decade ago.

Read Adam Sweeting's review of the Below the Surface Finale